Addition using number bonds

Videos, worksheets, solutions and activities to help students learn addition using number bonds in Singapore Math.

In this lesson, we will learn

Adding by Making 10 using Number Bonds

Adding Tens and Ones using Number Bonds

The following figure shows how to use Number Bonds and Make Ten Strategy for Addition. Scroll down the page for more examples and solutions.

Adding by Making 10

The "Make 10" strategy is used in Singapore Math for addition within 20. Using the idea of number bonds, the students have already been trained to recognize patterns of numbers that make 10.
1 and 9 makes 10
2 and 8 makes 10
3 and 7 makes 10
4 and 6 makes 10
5 and 5 makes 10

This pattern is then used to add other numbers.

For example,
8 + 6 is rewritten as 8 + 2 + 4 = 10 + 4 = 14

With sufficient practice, the students should be able to do the math in their heads.

Make 10 strategy for Addition
The following video shows how to add within 20 using the "make 10" strategy.
Examples:
7 + 5
4 + 9
8 + 7

Make 10 strategy when adding within 20
Step 1: The first addend and what make 10
Step 2: Write the number below the second addend
Step 3: The number below the second addend and what make the second addend?
Step 4: Add the rest to 10

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